Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries...

Reversible cerebral vasoconstriction syndrome (RCVS, sometimes called Call-Fleming syndrome) is a disease characterized by a weeks-long course of thunderclap...

Hypoxic pulmonary vasoconstriction (HPV), also known as the Euler-Liljestrand mechanism, is a physiological phenomenon in which small pulmonary arteries...

sympathetic nervous system activity. Vasodilation is the opposite of vasoconstriction, which is the narrowing of blood vessels. When blood vessels dilate...

Epinephrine (adrenaline) reacts with both α- and β-adrenoreceptors, causing vasoconstriction and vasodilation, respectively. Although α receptors are less sensitive...

and is determined by the autonomic nervous system. Vasodilation and vasoconstriction are also used antagonistically as methods of thermoregulation. The...

on topical application as dilute solution (0.05–0.1%) produce local vasoconstriction. Regular use of decongestants for long periods should be avoided because...

be caused by artery blockages, rupture, mechanical compression, or vasoconstriction. The resulting lesion is referred to as an infarct (from the Latin...

and vascular components. Hemostasis consists of four main stages: Vasoconstriction (vasospasm or vascular spasm): Here, this refers to contraction of...

effects are on the cardiovascular system, which displays peripheral vasoconstriction, slowed heart rate, redirection of blood to the vital organs to conserve...

sustained hypotension (decrease in blood pressure) Vasoconstriction of certain arteries Vasoconstriction of arteries to heart (coronary artery); however...

flow combined with tachycardia Cool skin due to vasoconstriction and stimulation of vasoconstriction Rapid and shallow breathing due to sympathetic nervous...

may be beneficial not only by augmenting sympathetically mediated vasoconstriction, but also because a large subset of POTS patients appear to have low...

tolerable than sumatriptan. Rizatriptan and other triptans can cause vasoconstriction, they are contraindicated in people with cardiovascular conditions...

bicarbonate and cocaine that is used to provide topical analgesia and vasoconstriction during ear, nose, and throat surgery, especially for operations on...

Vasospasm refers to a condition in which an arterial spasm leads to vasoconstriction. This can lead to tissue ischemia (insufficient blood flow) and tissue...

Angiotensin is a peptide hormone that causes vasoconstriction and an increase in blood pressure. It is part of the renin–angiotensin system, which regulates...

direct) effect of sympathetic stimulation on coronary arteries is vasoconstriction followed by a secondary vasodilation caused by the release of vasodilatory...

iron deficiency, vitamin B12 deficiency, fevers, fibromyalgia or vasoconstriction. There may also be differences in people in the expression of uncoupling...

oxymetazoline results in vasoconstriction. In addition, the local application of the drug also results in vasoconstriction due to its action on endothelial...

ergot-containing medications within 24 hours can result in additive vasoconstriction. Increased systemic exposure to sumatriptan can occur if used within...

cerebral vasoconstriction which ultimately narrows blood vessels in the brain leading to cerebral hypoxia and tissue ischaemia. Vasoconstriction of blood...

promoting coagulation. Locally acting hemostatic agents work by causing vasoconstriction or promoting platelet aggregation. Hemostatic agents are used during...

of vasoconstrictive responses within the body, including pulmonary vasoconstriction – a possible mechanism in which oxygenation decreases during pneumonia...

The hunting reaction or hunting response is a process of alternating vasoconstriction and vasodilation in extremities exposed to cold. The term Lewis reaction...

blood vessels the principal effect of activation of these receptors is vasoconstriction. Blood vessels with α1-adrenergic receptors are present in the skin...

pulmonary circulation is known as the pulmonary vascular resistance (PVR). Vasoconstriction (i.e., decrease in blood vessel diameter) increases resistance, whereas...

release epinephrine and norepinephrine, which results in peripheral vasoconstriction (reducing size of blood vessels) in order to conserve the circulating...

Decreases and increases in temperature trigger vasoconstriction and vasodilation respectively. Vasoconstriction affects flow rate and surface properties of...

and absorption, the body must increase cardiac output and peripheral vasoconstriction to maintain enough blood pressure to perfuse vital organs, such as...